declare
  v_object_id_one acs_rels.object_id_one%TYPE;
  v_object_id_two acs_rels.object_id_two%TYPE;
  n_rows          integer;
  v_error         text;
  map             record;
begin
  -- First check if removing this relation would violate any relational constraints
  v_error := rel_constraint__violation_if_removed(old.rel_id);
  if v_error is not null then
      raise EXCEPTION '-20000: %', v_error;
  end if;

  select object_id_one, object_id_two into v_object_id_one, v_object_id_two
  from acs_rels
  where rel_id = old.rel_id;

  for map in  select *
	      from group_component_map
	      where rel_id = old.rel_id 
  LOOP

    delete from group_element_index
    where rel_id = old.rel_id;

    select count(*) into n_rows
    from group_component_map
    where group_id = map.group_id
    and component_id = map.component_id;

    if n_rows = 0 then

      perform party_approved_member__remove(map.group_id, member_id, rel_id, rel_type)
      from group_approved_member_map
      where group_id = map.group_id
      and container_id = map.component_id;

      delete from group_element_index
      where group_id = map.group_id
      and container_id = map.component_id
      and ancestor_rel_type = 'membership_rel';
    end if;

  end loop;


  for map in  select *
              from group_component_map
	      where group_id in (select group_id
		               from group_component_map
		               where component_id = v_object_id_one
			       union
			       select v_object_id_one
			       from dual)
              and component_id in (select component_id
			           from group_component_map
			           where group_id = v_object_id_two
				   union
				   select v_object_id_two
				   from dual)
              and group_contains_p(group_id, component_id, rel_id) = 'f' 
  LOOP

    delete from group_element_index
    where group_id = map.group_id
    and element_id = map.component_id
    and rel_id = map.rel_id;

    select count(*) into n_rows
    from group_component_map
    where group_id = map.group_id
    and component_id = map.component_id;

    if n_rows = 0 then
    end if;

      perform party_approved_member__remove(map.group_id, member_id, rel_id, rel_type)
      from group_approved_member_map
      where group_id = map.group_id
      and container_id = map.component_id;

      delete from group_element_index
      where group_id = map.group_id
      and container_id = map.component_id
      and ancestor_rel_type = 'membership_rel';

  end loop;

  return old;

end;